Hi...
I'm not sure if it's important you attach a desk to your character but you may find it easier to just keep the desk as a separate prop in your scene where you place your character behind it (you can do this by switching to 3D View and adjust your characters position along the z-axis).
Cartoon Animator has options to link (temporary) or attach (permanent) props to a character and an explanation of their uses can be found
HERE.
There is also a great tutorial covering attaching or linking that can be found
HERE. This should help and it also explains how to get the layer order correct.
Peter
Forum Administrator
www.reallusion.com